Properties of the Number 11907

Eleven Thousand Nine Hundred Seven

Basics

Value: 11906 → 11907 → 11908

Parity: odd

Prime: No

Previous Prime: 11903

Next Prime: 11909

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 3 ⁵ × 7 ²

Divisors: 1, 3, 7, 9, 21, 27, 49, 63, 81, 147

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10111010000011

Octal: 27203

Duodecimal: 6A83

Hexadecimal: 2e83

Square: 141776649

Square Root: 109.11920087683927

Classification

Fibonacci: No

Bell Number: No

Factorial Number: No

Regular Number: No

Perfect Number: No

Special

Kaprekar Constant: No

Munchausen Constant: No

Armstrong Number: No

Kaprekar Number: No

Catalan Number: No

Vampire Number: No

Taxicab Number: No

Super Prime: No

Friedman Number: No

Fermat Number: No

Cullen Number: No

OEIS Sequences

Numbers k such that k divides 4^k - 1. A14945

Numbers k such that k | 5^k + 1. A15951

Numbers of the form 3ⁱ*7^j with i, j >= 0. A3594

Product of the 5th power of a prime and different distinct prime of the 2nd power (p⁵*q²). A179646

Numbers whose prime factors are 3 and 7. A33850

Numerators of the sequence whose Dirichlet convolution with itself yields squares, A000290. A318649

Triangular array read by rows: row n shows the coefficients of the polynomial p(x,n) constructed as in Comments; these polynomials form a strong divisibility sequence. A327321

a(n) = ∑_k=0..n Stirling2(n,k) * binomial(6·k,k) / (5·k + 1). A346767

G.f. A(x) satisfies: [xⁿ] A(x)ⁿ⁺¹ = [xⁿ] (1 + x·A(x)^2·n-1)ⁿ⁺¹ for n >= 0. A360343

Numbers k = p1^e1*p2^e2, with e1 ≠ e2, such that the Euclidean distance between points (p1, e1) and (p2, e2) is an integer. A387172